In vivo behavior of human muscle during isometric ramp contraction: A simultaneous EMG, MMG and ultrasonography investigation

Dong Ni, Xin Chen, Wanguan Yi, Yongping Zheng, Zhenyu Zhu, Shing Chow Chan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)

Abstract

The purpose of this study was to investigate the electromyography (EMG), mechanomyography (MMG), and the muscle architecture, i.e. cross-sectional area (CSA), amplitude versus torque relationships during voluntary isometric ramp contractions. The ultrasound images, EMG and MMG signals were simultaneously recorded from the rectus femoris (RF) muscle. A novel image processing algorithm was developed to automatically extract cross-sectional area (CSA) from ultrasound images. The root mean square (RMS) amplitudes of the EMG and MMG were computed on adjacent epochs in synchronization with the ultrasound images. Polynomial regression analyses indicated that both EMG and MMG amplitudes increased and CSA decreased curvilinearly with torque increment, and the change fashion of CSA was significantly different from those of EMG and MMG. The results demonstrated that the continuous change of CSA can provide useful information about muscle contractions. It may therefore complement EMG and MMG for studying muscle activation strategies.
Original languageEnglish
Title of host publication2012 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2012
Pages59-62
Number of pages4
DOIs
Publication statusPublished - 26 Nov 2012
Event2012 2nd IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2012 - Hong Kong, Hong Kong
Duration: 12 Aug 201215 Aug 2012

Conference

Conference2012 2nd IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2012
Country/TerritoryHong Kong
CityHong Kong
Period12/08/1215/08/12

Keywords

  • cross-sectional area
  • electromyography
  • isometric contraction
  • mechanomyography
  • ultrasonography

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing

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